ABNC SPECIMEN MOTHERLODE. Archival quality (after all, they did come from the American Bank Note Company archives) 1905 to 1963 period mini-collection of SPECIMEN overprinted and security punch-holed stamps, all neatly organized, identified and stored in a small high quality stockbook. This group was purchased back in the early 1990s by Kasimir Bileski at the famous ABNC Archives sales, who then sorted, researched and marketed the material. Over 200 stamps and 16 proof pieces total, including both regular and Back of the Book issues. Most have been identified for the ABNC printing order that they come from. The lot includes Bileski's extensive original detailed and informative sales blurbs noting that very few of some of the sets of these postal issue Specimens and proofs exist. Original 1990 Bileski retail price for this lot.